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Loudspeaker System

a loudspeaker and speaker technology, applied in the field of loudspeaker systems, can solve the problems of not easy to designate and difficult to determine the delay amount for the respective speaker uni

Active Publication Date: 2015-12-24
TOA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a new technology that improves the efficiency of solar cells. The technology involves using a special coating on the surface of the solar cell that helps to capture and convert sunlight into electricity. This results in a more effective solar cell that can generate more energy.

Problems solved by technology

However, there is a problem that it is not easy to designate the delay amounts for the respective speaker units such that the directional characteristics of the speaker apparatus correspond to a desired listening target area.
For these reasons, it is necessary to specify the relative positional relationship between the speaker apparatus and the listening target area as a positional relationship in a three-dimensional space, and therefore it is not easy to determine the delay amounts for the respective speaker units.
In particular, at the site where the speaker apparatus is installed, determining the delay amounts for the respective speaker units is not easy.
For example, it is not easy to determine how much the listening target area deviates from the front direction of the speaker apparatus.
However, in the case of employing such a method, if the actual installation position and direction of the speaker apparatus in the acoustic space are different from a preliminarily envisaged position and direction, there arises a problem that the directional characteristics of the speaker apparatus do not correspond to a desired listening target area.

Method used

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Examples

Experimental program
Comparison scheme
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embodiment 1

1>

[0050]FIG. 1 is a block diagram illustrating a configuration example of a loudspeaker system 1 according to Embodiment 1 of the present invention. The loudspeaker system 1 is configured to include: a speaker apparatus 10 that amplifies an acoustic signal inputted from an external device to output it from two or more speaker units 2; and a PC (personal computer) 20 that generates directional control parameters for controlling the directional characteristics of the speaker apparatus 10.

[0051]The speaker apparatus 10 is an array speaker capable of performing the directional control of acoustic output by adjusting a delay amount of the acoustic signal, and configured to include a speaker set 11 including the two or more speaker units 2, amplifiers 12, digital / analog converters 13, a DSP (digital signal processor) 14, and a camera 15.

[0052]The speaker set 11 is an array unit in which the respective speaker units 2 are arranged in an array. The digital / analog converters 13 and the ampli...

embodiment 2

[0077]In Embodiment 1, an example of the case where a position on the camera image 30 designated by a user is used as the target position 32 to control the directional characteristics of the speaker apparatus 10 is described. On the other hand, in the present embodiment, the case where an area on a camera image 30 is determined from two or more positions designated on the camera image 30 by a user, and a predetermined position in the area is specified as a target position 32 is described.

32>

[0078]FIG. 5 is a diagram illustrating an example of an area R0 on the camera image 30 determined in a loudspeaker system 1 according to Embodiment 2 of the present invention, and the target position 32 specified from the area R0. A target position designation part 101 of a directional control parameter generating part 24 determines the area R0 on the camera image 30 on the basis of two or more positions on the camera image 30 designated by a user. For example, when two different positions on the...

embodiment 3

[0085]In Embodiment 2, an example of the case where the position farthest from the reference position P0 in the area R0 is specified as the target position 32 is described. On the other hand, in the present embodiment, the case where a position farthest from a reference position P0 in an area R0 is specified as a first target position 32, and also a position closest to the reference position P0 in the area R0 is specified as a second target position 32 is described.

[0086]FIG. 8 is an explanatory diagram schematically illustrating an example of the relationship between an emission pattern of a speaker apparatus 10 in a loudspeaker system 1 according to Embodiment 3 of the present invention and an area R on a floor surface F. FIG. 9 is a diagram illustrating a situation of the relationship between the emission pattern and the area R in FIG. 8 when viewed in a horizontal direction.

[0087]A target position designation part 101 of a directional control parameter generating part 24 specifi...

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PUM

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Abstract

Provided is a loudspeaker system capable of easily determining control parameters for controlling the directional characteristics of a speaker set including two or more speaker units. The loudspeaker system is configured to include: a speaker set 11 including two or more speaker units 2; a camera 15 adapted to photograph an acoustic space of the speaker set 11; a monitor 22 adapted to display a camera image 30 photographed by the camera 15; and a directional control parameter generating part 24 adapted to generate directional control parameters providing the directional characteristics of the speaker set 11. The directional control parameter generating parts 24 includes: a target position designation part 101 adapted to, on the basis of user operations, designate target positions 32 on the camera image 30; a directional control angle calculation part 103 adapted to, on the basis of the target positions 32, obtain directional control angles θ with respect to a front direction of the speaker set 11; and a directional control parameter determination part 104 adapted to, on the basis of the directional control angles θ, determine the directional control parameters.

Description

TECHNICAL FIELD [0001]The present invention relates to a loudspeaker system, and more specifically, to improvement of a loudspeaker system adapted to perform directional control of a speaker set including two or more speaker units.BACKGROUND ART [0002]Conventional speaker apparatuses include one that is disposed with multiple speaker units driven by a common acoustic signal in the same housing, includes multiple phase adjustment circuits, which are related to the speaker units, and can control the directional characteristics of the speaker apparatus by adjusting delay amounts of the acoustic signal among the speaker units (e.g., Patent Literature 1).[0003]By installing such a speaker apparatus in an acoustic space such as a concert hall or a conference room, and appropriately adjusting the delay amounts for the respective speaker units, the directional characteristics of the speaker apparatus can be controlled so as to make a specific area in the acoustic space serve as a listening ...

Claims

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Application Information

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IPC IPC(8): H04R1/32H04R3/12G06F3/16H04R1/40
CPCH04R1/403H04R5/04H04R2201/401G06F3/165H04R2203/12H04R3/12H04R2201/405H04S7/302H04R1/323
Inventor KUBOTA, HIROSHIMIYATA, SATOSHI
Owner TOA CORP